<!DOCTYPE HTML>
<html>
    <head>
        <title>Example</title>
        <meta name="author" content="Adam Freeman"/>
        <meta name="description" content="A simple example"/>
        <link rel="shortcut icon" href="favicon.ico" type="image/x-icon" />
        <style title="core styles">
            #block1 { color: white; border: thick solid black; background-color: gray;}
            p {
                border: medium double black;
                background-color: lightgray;
            }
            table {border: thin solid black; border-collapse: collapse;
                    margin: 5px; float: left;}
            td {padding: 2px;}
        </style>
    </head>
    <body>
        <p id="block1">There are lots of different kinds of fruit - there are over
            500 varieties of banana alone. By the time we add the countless types of
            apples, oranges, and other well-known fruit, we are faced with thousands of
            choices.
        </p>
        <p id="block2" style="border: medium dashed blue; color: red; padding: 2px">
            One of the most interesting aspects of fruit is the variety available in
            each country. I live near London, in an area which is known for
            its apples.
        </p>
        <div><button id="pressme">Press Me </button></div>        
        <div id="placeholder"></div>
        <script>
            var placeholder = document.getElementById("placeholder");
            displayStyles();
            
            document.getElementById("pressme").onclick = function() {
                document.styleSheets[0].cssRules.item(1).style.paddingTop = "10px";
                document.styleSheets[0].cssRules.item(1).style.paddingRight = "12px";
                document.styleSheets[0].cssRules.item(1).style.paddingLeft = "5px";
                document.styleSheets[0].cssRules.item(1).style.paddingBottom = "5px";                   
                displayStyles();
            }
            
            function displayStyles() {
                if (placeholder.hasChildNodes()) {
                    var childCount = placeholder.childNodes.length;
                    for (var i = 0; i < childCount; i++) {
                        placeholder.removeChild(placeholder.firstChild);
                    }
                }
                displayStyleProperties(document.styleSheets[0].cssRules.item(1).style);
                displayStyleProperties(document.getElementById("block2").style);
            }
            
            function displayStyleProperties(style) {
                var newElem = document.createElement("table");
                newElem.setAttribute("border", "1");                    

                addRow(newElem, "border", style.border);
                addRow(newElem, "color", style.color);
                addRow(newElem, "padding", style.padding);
                addRow(newElem, "paddingTop", style.paddingTop);

                placeholder.appendChild(newElem);                
            }

            function addRow(elem, header, value) {
                elem.innerHTML += "<tr><td>" + header + ":</td><td>"
                    +  value + "</td></tr>";
            }
        </script>
    </body>
</html>
